你这个采用UART接收到数据之后，可以加入DMA，一个回合后，你从DMA里面把数据读出来分析就行了，
你看看我这里有一个UART和DMA初始化的部分代码，希望对你有启示
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
/* Configure USART2 */
USART_Init(USART2, &USART_InitStructure);
/* Enable USART2 Receive and Transmit interrupts */
//USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
/* Enable the USART2 USART1*/
USART_Cmd(USART2, ENABLE);
////////以上是UART的初始化 以下是DMA的
pATFifo = dmafifo_init();
_fifobuffer = pATFifo;
DMA_DeInit(DMA1_Channel6);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART2->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)_fifobuffer->data;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = FIFOBUF_LEN;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel6, &DMA_InitStructure);
USART_DMACmd(USART2, USART_DMAReq_Rx, ENABLE);
USART_Cmd(USART2,ENABLE);
DMA_Cmd(DMA1_Channel6, ENABLE);
stm32/stm8